Usually calls read_six_numbers to parse the input into an array on the stack. 2. The First Element (The Anchor) The code immediately checks the first number (at index 0).
Look for a jne (jump if not equal) that loops back to an earlier instruction.
The phrase "" most commonly refers to a specific phase or challenge within the CS:APP Bomb Lab , a popular computer systems assignment where students must "defuse" a series of binary phases using reverse engineering. 2 : A Certain Bomb
In most versions of the Bomb Lab, Phase 2 requires the user to input a sequence of six integers. The program checks these numbers against a specific mathematical progression logic. 1. Input Requirement Six integers separated by spaces.
In many lab variants, the first number must be 1 (or occasionally 0 ). If this check fails, the bomb explodes immediately. 3. The Iterative Logic Usually calls read_six_numbers to parse the input into
cmp : Comparing the calculated value against your input at 8(%rsp, %rbx, 4) . 4. Common Mathematical Patterns
The core of this phase is a loop that iterates from the second number to the sixth. You will typically see assembly instructions like: Look for a jne (jump if not equal)
1 3 5 7 9 11 (adding a constant like +2positive 2 Fibonacci-style: (adding the current index to the previous value). 💡 Defusing Strategy To solve your specific version, use a debugger like GDB : Disassemble the function: Run disas phase_2 .